Page - 1054 - in Book of Full Papers - Symposium Hydro Engineering

(2) The strain-plate length distribution of FRP plate indirectly reflects the bonded quality of specimen and corresponds to the strength error reflected by the calculation outcome of Chen-Teng formula. (3) The effective bonding length of FRP plate is estimated by analyzed the surface strain distribution of FRP plate along the length direction. The determination of effective bonding length of FRP plate in project applications means a lot for reducing reinforcement costs and construction work load. ACKNOWLEDGEMENTS This work was financially supported by the National Natural Science Foundation of China (51779101, 51209102), and scientific research achievements promotion and transformation demonstration funds of Yellow River Institute of Hydraulic Research (HKYTZJJ-2016-01). REFERENCES [1] McKenna J K, Erki M A. Strengthening of reinforced concrete flexural members using externally applied steel plates and fibre composite sheets-a survey. Canadian Journal of Civil Engineering, 1994, 21(1): 16-24. [2] Sebastian W M. Significance of midspan debonding failure in FRP-plated concrete beams. Journal of Structural Engineering, 2001, 127(7): 792-798. [3] Van Gemert D A. Repairing of concrete structures by externally bonded steel plates. Developments in Civil Engineering,1982,5: 519-526. [4] Sharma S,Mohamed Ali M,Goldar Detal. Plate-concrete interfacial bond strength of PRP and metallic plated concrete specimens. Composites ,PartB : Engineering, 2006, 37(1):54-63. [5] Lu Xinzheng. Studies on FRP-Concrete Interface. Tsinghua University, 2004.（in chinese） [6] Dai J,Ueda T,Sato Y. Development of the nonlinear bond stress-slip model of fiber reinforced plastics sheet-concrete interfaces with a simple method. Journal of Composites for Construction,ASCE,2005,9(1):52-62. [7] Yamaguchi I. A laser-speckle strain gauge. Journal of Physics(E),1981, 14(5):1270-1273. [8] Peters W H,Ranson W F. Digital Imaging Techniques in Experimental Stress Analysis. Optical Engineering,1982,21(3):427-431. [9] Yao Jian, Teng Jinguang. Experimental study on bond strength between FRP and concrete. Journal of Building Structures,2003,24 (5):10-18. [10] Ali-Ahmad M, Subramaniam K, Ghosn M. Experimental investigation and fracture analysis of debonding between concrete and FRP sheets. Journal of engineering mechanics, 2006, 132(9): 914-923. [11] Lu X Z, Teng J G, Ye L P, et al. Bond–slip models for FRP sheets/plates bonded to concrete. Engineering structures, 2005, 27(6): 920-937.（ in chinese） 1054